FireTEAM Test FireTEAM Mechanical Aptitude 2

Question 1

A firefighter uses a crowbar to pry open a door. The crowbar is 36 inches long and the pivot point is 4 inches from the door. What type of simple machine is the crowbar acting as?

Accepted Answer

First-class lever

Answer

A crowbar used as a pry bar with the fulcrum between effort and load acts as a first-class lever.

Question 2

Water flows through a pipe that narrows from 4 inches in diameter to 2 inches in diameter. What happens to the water pressure as it enters the narrower section?

Accepted Answer

Pressure decreases and velocity increases

Answer

According to Bernoulli's principle, when fluid velocity increases in a narrower pipe, pressure decreases.

Question 3

A fire hose reel has a handle with a radius of 18 inches attached to an axle with a radius of 3 inches. What is the mechanical advantage of this wheel-and-axle system?

Accepted Answer

6

Answer

Mechanical advantage of a wheel and axle equals the wheel radius divided by the axle radius: 18 ÷ 3 = 6.

Question 4

A ladder is leaning against a wall at a 75-degree angle from the ground. If the base slides outward, what happens to the top of the ladder?

Accepted Answer

It moves down the wall

Answer

When the base slides out, the angle decreases and the top of the ladder slides down the wall.

Question 5

A pump produces 150 PSI of pressure. If you connect two identical pumps in parallel (both pumping into the same line), what is the resulting pressure?

Accepted Answer

150 PSI

Answer

Pumps in parallel increase flow rate but not pressure; pressure remains the same at 150 PSI.

FireTEAM Practice Test

FireTEAM Practice Test

FireTEAM Test FireTEAM Mechanical Aptitude 2